Gauge for machines for folding sheet metal



3m mm 1,521,367 v P. R. HAHNEMANN- GAUGE FOR MACHINES FOR FOLDING SHEETMETAL Filed Nov. 12, 1925 tlhll'l STATES unset .PTENT QFFIE.

PAUL R. HAHNEMANN, OF SOUTHINGTON, CONNECTICUT, ASSIGNOR TO THE PECKSTOW & 'WILCOX CO'., 012 SOUTHINGTON, CONNECTICUT, A CORPORATION.

GAUGE FOR MACHINES FOR FOLDING SHEET METAL.

Application filed November 12, 1923.

To (1 107mm, it may concern:

Be it known that I, PAUL R. HAHNEMANN, a citizen of the United States,residing at Southiugton, in the county of Hartford and State ofConnecticut, have invented a new and useful Improvement in Gauges forMachines for Folding Sheet l/letal; and I do hereby declare thefollowing, when taken in connection wit.) the accompanying drawings andthe characters of reference marked thereon, to be a full, clear, andexact description of the same, and which said drawings constitute partof this application, and represent, in-

Figure 1 a perspective view of my improved gauge.

ltigv 2 a view thereof in longitudinal section on the line 22 of Fig.1.

F 3 a view thereof in transverse section on the line 33 of Fig. 1.

F 4 a detached, perspective view of one of the perforated steelgauge-teeth.

My invention relates to an improvement in gauges. designed for machinesfor folding sheet-metal, of he type shown and described in United StatesPatent No. 314,311, grantrd irlarch 2%, 1885, to The Peck, Stow &-.Yilcox (lompany, on the application of Williani J] Bayrer, theobjectbeing to provide an eliicicnt gauge of the character described,mnstructcd with particular reference to resisting wear in use and torigidity, whereby it markedly increases the accuracy of the productturned out by the machine.

l-Yith these ends in view, my invention consists in a gauge consistingof a castmetal body and a series of independently 'loriucd hardenedteeth having their inner cuds cmhwlded in the said body when the same is738i, and perforated for the liowage of the metal thereof through them,whereby they are anchored in place, and the continuity of the cast-metalmaintained throughthe whole series of teeth.

lu carrying out my invention, as herein shown, I employ a series ofsteel gauge-teeth 5 having their inner ends formed with transverseperforations e. A suitable number of such teeth. equally spaced apart.are install- Serial No. 674,420.

ed in the mold in which the gauge-body 7 is cast, at which time thefluid metal flows through the perforations 6 of the teeth 5, and notonly firmly anchors them in place, but maintains the continuity of themetal from one end of the front bar 8 of the gauge- 5 body 7 to theother. After the inner ends of the teeth 5 have thus been cast into thegauge-body 7, the forwardly-projecting ends of the teeth are hardened inany suitable manner and then ground to a gauge, where by they are madeso hard as to effectually resist the cutting action of the sharp edgesof sheet-metal shoved against them and so gauged preparator 7 to beingfolded in the machine. Therefore, a machine provided 6 with my improvedgauge, with hardened teeth cast into its body, may be depended upon fora degree of accuracy through-out the life of the machine far above amachine in which the gauge-teeth are cast integral with the body and ofthe same material, necessitating the frequent truing up of the teeth,and the ultimate replacement of the gauges, whereas, under my invention,the gauge requires no such attention.

I am aware that anchoring of inserts in cast-metal bodies by flowing themolten metal through. openings in them is old and do not claim that ideabroadly, but only as applied to the new article of manufacture hereinclaimed.

I claim:

As a new article of manufacture, a unitary, remoyable gauge forsheet-metal folding machines, comprising a body and a series ofindependently-formed teeth provided at their inner ends withperforations and having their said ends permanently and rigi l ly unitedwith the said body by integral portions thereof extending through thesaid perforations.

In testimony whereof. l, have signed this specification in the presenceof two subscribing witnesses.

PAUL R. HAHNdh IANN.

lVitnesses Bonner R. PRATT, CHARLES T. hilosi-imn.

